forked from OSchip/llvm-project
6b556f824d
When the source register to a 2-addr instruction is undefined, there is no need to attempt any transformations - simply replace the source register with the destination register. This also comes up when lowering IMPLICIT_DEF instructions - make sure the <undef> flag is moved to the new partial register def operand: %vreg8<def> = INSERT_SUBREG %vreg9<undef>, %vreg0<kill>, sub_16bit rewrite undef: %vreg8<def> = INSERT_SUBREG %vreg8<undef>, %vreg0<kill>, sub_16bit convert to: %vreg8:sub_16bit<def,read-undef> = COPY %vreg0<kill> llvm-svn: 159120 |
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clang | ||
compiler-rt | ||
debuginfo-tests | ||
libclc | ||
libcxx | ||
libcxxabi | ||
lld | ||
lldb | ||
llvm | ||
polly |